How to increase rsize/wsize ?

How to increase rsize/wsize ?

[Yan Rui]

Hi,

I failed to mount a nfs share with a bigger rsize/wsize (in my case,
512K).=A0=A0 The biggest rsize/wsize I can get is only 256KB on my Ubun=
tu
9.10 server box.=A0 Can anyone give me some suggestions?

root@d03:~# exportfs -v
/tmp=A0=A0=A0=A0=A0=A0=A0=A0=A0 =A0=A0=A0 <world>(rw,wdelay,root_squash=
,no_subtree_check)

root@d04:~# mount -t nfs -o wsize=3D524288,rsize=3D524288 d03:/tmp /mnt=
/nfs

root@d04:~# nfsstat -m
/mnt/nfs from d03:/tmp
=A0Flags:=A0=A0=A0 rw,relatime,vers=3D3,rsize=3D262144,wsize=3D262144,n=
amlen=3D255,hard,proto=3Dtcp,timeo=3D600,retrans=3D2,sec=3Dsys,mountadd=
r=3D10.0.0.3,mountvers=3D3,mountproto=3Dtcp,addr=3D10.0.0.3

root@d03:~# uname -a
Linux d03 2.6.31-14-server #48-Ubuntu SMP Fri Oct 16 15:07:34 UTC 2009
x86_64 GNU/Linux

root@d03:~# dpkg -l | grep nfs
ii=A0 nfs-common=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0 1:1.2.0-2ubuntu8
 NFS support files common to client and serve
ii=A0 nfs-kernel-server=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
 1:1.2.0-2ubuntu8
 support for NFS kernel server

According to NFS-HOWTO, I have checked the kernel const
NFSSVC_MAXBLKSIZE.  It is 1M on 2.6.31.

Any comments will be appreciated!

Regards,
Rui

Re: How to increase rsize/wsize ?

[Yan Rui]

More info on this issue..

The client and server are directly conected  to a gigabit switch. The
MTU is default 1500.  Server and client (in my case, d03 and d04) are
with the same hardware, OS and configurations.

Thanks,
Rui

On Mon, Jun 21, 2010 at 11:29 PM, Yan Rui <rui.yan@gmail.com> wrote:
> Hi,
>
> I failed to mount a nfs share with a bigger rsize/wsize (in my case,
> 512K).=A0=A0 The biggest rsize/wsize I can get is only 256KB on my Ub=
untu
> 9.10 server box.=A0 Can anyone give me some suggestions?
>
> root@d03:~# exportfs -v
> /tmp=A0=A0=A0=A0=A0=A0=A0=A0=A0 =A0=A0=A0 <world>(rw,wdelay,root_squa=
sh,no_subtree_check)
>
> root@d04:~# mount -t nfs -o wsize=3D524288,rsize=3D524288 d03:/tmp /m=
nt/nfs
>
> root@d04:~# nfsstat -m
> /mnt/nfs from d03:/tmp
> =A0Flags:=A0=A0=A0 rw,relatime,vers=3D3,rsize=3D262144,wsize=3D262144=
,namlen=3D255,hard,proto=3Dtcp,timeo=3D600,retrans=3D2,sec=3Dsys,mounta=
ddr=3D10.0.0.3,mountvers=3D3,mountproto=3Dtcp,addr=3D10.0.0.3
>
> root@d03:~# uname -a
> Linux d03 2.6.31-14-server #48-Ubuntu SMP Fri Oct 16 15:07:34 UTC 200=
9
> x86_64 GNU/Linux
>
> root@d03:~# dpkg -l | grep nfs
> ii=A0 nfs-common=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0 1:1.2.0-2ubuntu8
> =A0NFS support files common to client and serve
> ii=A0 nfs-kernel-server=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
 1:1.2.0-2ubuntu8
> =A0support for NFS kernel server
>
> According to NFS-HOWTO, I have checked the kernel const
> NFSSVC_MAXBLKSIZE. =A0It is 1M on 2.6.31.
>
> Any comments will be appreciated!
>
> Regards,
> Rui
>

Re: How to increase rsize/wsize ?

[Dean Hildebrand]

What's the value of /proc/fs/nfsd/max_block_size?  I'm not sure how it 
is set, but it does not default to the max.
Dean

On 6/21/2010 8:29 AM, Yan Rui wrote:
> Hi,
>
> I failed to mount a nfs share with a bigger rsize/wsize (in my case,
> 512K).   The biggest rsize/wsize I can get is only 256KB on my Ubuntu
> 9.10 server box.  Can anyone give me some suggestions?
>
> root@d03:~# exportfs -v
> /tmp<world>(rw,wdelay,root_squash,no_subtree_check)
>
> root@d04:~# mount -t nfs -o wsize=524288,rsize=524288 d03:/tmp /mnt/nfs
>
> root@d04:~# nfsstat -m
> /mnt/nfs from d03:/tmp
>   Flags:    rw,relatime,vers=3,rsize=262144,wsize=262144,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=10.0.0.3,mountvers=3,mountproto=tcp,addr=10.0.0.3
>
> root@d03:~# uname -a
> Linux d03 2.6.31-14-server #48-Ubuntu SMP Fri Oct 16 15:07:34 UTC 2009
> x86_64 GNU/Linux
>
> root@d03:~# dpkg -l | grep nfs
> ii  nfs-common                        1:1.2.0-2ubuntu8
>   NFS support files common to client and serve
> ii  nfs-kernel-server                 1:1.2.0-2ubuntu8
>   support for NFS kernel server
>
> According to NFS-HOWTO, I have checked the kernel const
> NFSSVC_MAXBLKSIZE.  It is 1M on 2.6.31.
>
> Any comments will be appreciated!
>
> Regards,
> Rui
> --
> To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>    

Re: How to increase rsize/wsize ?

[Yan Rui]

Dean,

The max_block_size is 256KB on my nfs server.   By changing it to a
1MB,  I can mount a share with a bigger rsize/wsize now.  Thank you
very much!

Cheers,
Rui

On Wed, Jun 23, 2010 at 12:59 AM, Dean Hildebrand <seattleplus@gmail.com> wrote:
> What's the value of /proc/fs/nfsd/max_block_size?  I'm not sure how it is
> set, but it does not default to the max.
> Dean
>
> On 6/21/2010 8:29 AM, Yan Rui wrote:
>>
>> Hi,
>>
>> I failed to mount a nfs share with a bigger rsize/wsize (in my case,
>> 512K).   The biggest rsize/wsize I can get is only 256KB on my Ubuntu
>> 9.10 server box.  Can anyone give me some suggestions?
>>
>> root@d03:~# exportfs -v
>> /tmp<world>(rw,wdelay,root_squash,no_subtree_check)
>>
>> root@d04:~# mount -t nfs -o wsize=524288,rsize=524288 d03:/tmp /mnt/nfs
>>
>> root@d04:~# nfsstat -m
>> /mnt/nfs from d03:/tmp
>>  Flags:
>>  rw,relatime,vers=3,rsize=262144,wsize=262144,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=10.0.0.3,mountvers=3,mountproto=tcp,addr=10.0.0.3
>>
>> root@d03:~# uname -a
>> Linux d03 2.6.31-14-server #48-Ubuntu SMP Fri Oct 16 15:07:34 UTC 2009
>> x86_64 GNU/Linux
>>
>> root@d03:~# dpkg -l | grep nfs
>> ii  nfs-common                        1:1.2.0-2ubuntu8
>>  NFS support files common to client and serve
>> ii  nfs-kernel-server                 1:1.2.0-2ubuntu8
>>  support for NFS kernel server
>>
>> According to NFS-HOWTO, I have checked the kernel const
>> NFSSVC_MAXBLKSIZE.  It is 1M on 2.6.31.
>>
>> Any comments will be appreciated!
>>
>> Regards,
>> Rui
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>
>